class_docstr: A simple graph node.
  
  Args:
      ind (int): The index of the node.
code: def __init__(self, ind: int) -> None:
      self.__ind = ind
      self.__links = set()
  
imports: import functools
  import operator
  from typing import Dict, List, Tuple, Union
  import cv2
  import numpy
  import torch
  from mmengine.structures import InstanceData
  from numpy import ndarray
  from mmocr.registry import MODELS
  from mmocr.structures import TextDetDataSample
  from .base import BaseTextDetPostProcessor
label_desc: Use image node_id 1 to create a new Node object  with example: obj = Node(ind)